Question

to save the fuel to avoid pollution and good for health the two person p and q are going to their office by riding bicycle of 12 km if the speed of Q is 2 kilometre per hour more than the speed of P,Q person reaches the office 30 minutes earlier than p then find the average speed of the two cyclist p ana q​

Answer 1

Answer: 6.86 km/hr

Step-by-step explanation: suppose the speed of p = x km/hr

Speed of q = x+2 km/hr

Time difference = 30/ 60 =0.5 hr

12/x - 12/(x+2) = 0.5

24 = 0.5(x^2 + 2x)

X^2 + 2x - 48= 0

X = (-2+14)/2 = 6

Speed of p = 6km/hr

Speed of q = 8 km/hr

Avg = 2*6*8/(6+8) = 6.86 km/hr